package edu.sctu.practice.class01.nieyu.assign05;

/**
 * Created by Administrator on 2015/12/10.
 */
public class Sub_Add implements Sub,Add {

    public int add(int a,int b) {
        int sum=a+b;   return sum;
    }
    public int sub(int a,int b){
        int sum=a-b;   return sum;
    }
}
